Smoke-consumer.



S. SMITH & 'H. LANGTON. {SMOKE CONSUMER. APPLICATION FILED JUNE 2, 1914.

Patented Mar. 9, 1915.

' 3. SMITH & H. LANGTON.

SMOKE CONSUMER, APPLICATION FILED JUNE 2, 1914.

2 SHEBTS-SHBET 2 Patented Mar. 9, 1915.

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.SIVI OKECONSUIVIER.

Specification of Letters Patent.

Patented an. a, rain.

Application fiiea June 2, 1914. Serial No. 342,427.

ful Improvements in Smoke-Consumers, of

which the following is a specification.

Our invention relates to new and useful improvements in furnace constructions and more particularly to the draft arrangements thereof, the primary object of our invention being the provision of an overhead draft, resulting in much more perfect combustion and consequent saving of fuel and avoidance of smoke. Y

" altllore specifically, the object of our invennace having front-and rear walls 10 and 11,

tion is to provide means for supplying air above the bed of the fire in the furnace from the front, back and sides, in'such a manner that no forced draft will be required to insure perfect combustion of fueland smoke.

A still further object ofour present invention is to provide an additional supply of air at some point between the fire box and smoke stack of the furnace to insure complete consumption of all smoke. still further object'of our invention is to highly heat the air supplied to the fire box in order to render the'combustion still more ,With these and other objects in view, our

' n will be more fully described, illusthe accompanying drawings and then. "specifically pointed out in the claims which are attached to and form a part of this application.-

In the drawings: Figure 1 is a central longitudinal sectional View taken through a boiler furnace of conventional type, showing our invention applied thereto; Fig. 2 is a top plan view of the interiorof the furnace, the boiler being omitted to per mit more clear showing of the air tubes employed', certain of these tubes being shown in 2 And a a bridge wall 12, a front'arclflfit fire pit 14f, ash pit 15 and grate 16. Doors 1'? and 18 provide access to the fire pit and ash pit, respectively, and the normal draft ofth'e furnace is through the grate 16, as is usual in furnace constructions of this type.

'As best shown in Figs. 1 and 2 of'the drawings, the front arch 13 is hollow and.

has its rear end open. T he rear portion of thefront such is divided longitudinally by a plurality of spaced partition walls 19 providing a series of air tubes 29 all opening at their rear ends into thetire pit' and at their forward ends intofaTtransverse chamber 21. .Air tubes 22 lead from either side of this chamber 21 along the sides of the fire pit and over the top of the bridge wall, opening through the'back wall 11 of the furnace as shown in Fig. 2.

Located at either side of thefire box and slightly above the forward arch 13, are air tubes 23 closed at their forward ends and having their inner faces perforated at to admit air over the fire. These air tubes extend at their rear ends over the top of the bridge wall, being. located adjacent to the air tubes 22 and also opening through the back wall of the furnace. Located ad jaccnt the bridge Wall and transversely of the furnace, is a rear arch 2-1 provided centrally with a transverse partition and havinga central transverse chamber 26 communioating. with forwardly and rearwardly' extending passages 23' through which the air passes. .Air tubes lead from the ends of the central chamber 26 over the bridge wall and communicate at their outer ends through the back wall of the furnace, thesethemselves provide an air tube or passage 29 formed centrally along thebridge wall and terminating at its forward end in aforwardly converging chamber 30 opening directly over the back of the fire pit and immediatelyilt tlfie rear of the rear arch 25.

Vertically disposed air tubes 31 are located at either side of the furnace adjacent the rear end of the boiler 32 and are provided in their inner faces with draft open .ings 33. .The lower ends of these tubes are extended at rightpangles as shown at' 34 along the to of the air tubes 22 and also open throug the rear Wall of the furnace.

The various air tubes above described ments oras a built up structure formed from plates connected by partition walls-to provide the tubes. However, they will preferably be formed of brick or other suitable refractory substance-in the manner shown in the drawings. v

In operation. the ordinary draft 'of the furnace is sufficient to. create a suction through the air tubes 22, 23, 28, 29 and 31,

air beingd'ra'wn in through the rear wall of Y the furnace and during its passage through.

these tubes, being highly heated by the burning gases in the furnace. heated air is thendischarged throughthe passagesr2'7 of the back arch, draft openings 24 at the sides of the firebox, throughthe open forward end .ofthe draft chamber 30 over the bridge wall, and through the draft openings'33 of the vertical draft tubes 31.

It will be seen that in this manner, a supply of highly heated air is furnished 'immedi-' ately above the bed of the fire inf the fire pit.

'14 and that such air is supplied from all four sides of the fire pit. The currents oi" heated air-thus supplied meeting each other I Furthermore,

and the burning ases as they pass from the bed of the fire,

insure practically perfect combustion of the fuel and of such gases.

any unconsumed gases, "during their passage through the furnace, are later consumedby combination of the air en.-

'tering the-vertical draft tubes 31. Because of this, almost perfect combustion of'the fuel, gases and smoke is'iobtained, resulting in greateconomy in fuel, absence of'smoke and high heating capacity. The consumption of the smoke, of course, preserves the boiler and its tubes, thereby lengthening the life of the furnace. Furthermore,w'vith this draft j arrangement, absolutely no forced draft is necessary, the operation of the furnace being thereby cheapened and amount of fuel required reduced.

'It .will of course be understood that, al- I though We have illustrated this draft sys.-'

temin connection with one particular type offurnace, it may be readily applied to furplaces of all types whether for locomotives,

from the spirit of a This highly the stationary or marine boilers or boilers burning either coal or oil. We, therefore, do not wish to limit ourselves to the specific details of construction disclosed in the drawings and described'in the above specification as any changes, within the scope of the appended claims, maybe made at any time,

Without in the slightest degree departing our invention.

is claimed as new is:

1. Inboiler furnace construction, the combination with ajfire pit and bridge wall, of an air tube opening out of the furnace at the rear and terminatingsat its forward end in a fan shaped enlargement at the front ofthe bridgewalhla rear arch disposed in front of the bridge wall and "open at its frontand back for thepassage of air' from the fan shaped extension of the air tube,

"and a plurality of partition members in the arch. draft passages 20-01 the front arch,.draft.."

2. In boiler furnace. construction; the

of the bridge wall, a rear arch disposed in front of thebridge wall and open atits front andback for the passage of 'air from the fan shaped extension of thejair tube,

and a plurality of partition members. in the arch, said members extending from front to rear to form passageways.

' '3. In boiler furnaceconstruction, the

'cblflbination. with a fire pit and bridge wall,

of an air tube. opening out of the lfurnace -at the rea'rand terminating atfit-s forward end in a fan shaped enlargen mt at the front.

of the bridge wall, a reararch disposed in front of the bridge wall "and open at its .front and back for the passage of air from the fan shaped extension of the air tube,

and a pluralitynof partition members in the arch, said members extending from front to rear to form passageways, certain of the said members being broken away intermediate their length to provide communication between the passageways thus formed.

In testimony whereof we afiix our signatures in presence of two witnesses.

SAVILLE SMITH. he] HERBERTLANGTON. a 8.

Witnesses I Jon; MCCUE, ALBERT ALLEN.

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